| 摘要 |
PURPOSE:To reduce the number of optical isolators used and reduce the cost by using multiple input/output port optical fibers. CONSTITUTION:Multiple-input/output port optical fibers 1 having a Faraday element, a magnet, and a double-refraction crystal as basic elements are provided. For example, two pairs of optical fiber collimators 3 fitted with lenses 2 to optical fibers 1 are optically connected to an optical isolator main body 4 at an interval one by one while the optical axis is adjusted (A). The optical isolator main body 4 and the optical fiber collimators 3 are integrally fixed on a substrate, and the main portion is stored in a package for use. An adhesive, soldering, and YAG laser welding are applied for fixing. A rod lens or a spherical lens can be used for the lens fitted to the optical fiber 1. The optical fiber collimators 3 are directly fitted to the optical isolator main body 4 (B). The optical fiber collimator 3 fitted with one lens 2 to two optical fibers 1 is used (C). |
